also raises the question this is exactly the whole issue going back to the miranda, if he had the public safety concern of what were those explosive devices intended for? that's one of the reasons they wanted to talk to him or one of the things thaw wanted to talk to him about at the time before they realized how severely hurt he was. it absolutely proves the point there could have more more attacks planned or another person who was a part of it who maybe at the last minute didn't do it. another reason to think there was more planned is maybe that's why they didn't kill themselves at the time of the marathon attack. they wanted to live to attack another day. >> jeff, somebody must have trained them. can you learn to build a bomb by yourself just by going to the internet and going out there, go to a home depot and buying this kind of stuff? >> you could try to learn, but what you would certainly want to do is rehearse. you don't want to go through the operational energy that it would take to mount an attack like at the marathon without having a fair degree of confidence that your device i